should not make reservation when passenger passport number is invalid

src/main/java/hs/fulda/de/ci/exam/project/Itinerary.java

@@ -90,6 +90,7 @@ public class Itinerary {
 
     public void validatePassengerDetails(Passenger passenger){
         passenger.validateName();
+        passenger.validatePassportNumber();
     }
 
 

src/main/java/hs/fulda/de/ci/exam/project/Passenger.java

@@ -1,6 +1,8 @@
 package hs.fulda.de.ci.exam.project;
 
 import java.util.Date;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public class Passenger {
     private String name;
@@ -14,8 +16,21 @@ public class Passenger {
     }
 
     public void validateName() {
+        if(name.isBlank()) {
             throw new RuntimeException(("Name cannot be null or empty"));
         }
+    }
+
+    public void validatePassportNumber() {
+        Pattern pattern = Pattern.compile("^(?!^0+$)[a-zA-Z0-9]{3,20}$");
+        Matcher matcher = pattern.matcher(this.passportNumber);
+        if(passportNumber.isBlank()){
+            throw new RuntimeException("Passport number cannot be blank");
+        }
+        if(!matcher.matches()){
+            throw new RuntimeException("Passport number cannot be null or empty");
+        }
+    }
 
 
 }

src/test/java/hs/fulda/de/ci/exam/project/ItineraryTest.java

@@ -4,6 +4,8 @@ import org.junit.Assert;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 
@@ -11,7 +13,11 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.mockito.Mockito.*;
 import org.mockito.junit.jupiter.MockitoExtension;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Date;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -60,6 +66,23 @@ public class ItineraryTest {
         } catch (Exception e) {
             msg = e.getMessage();
         }
-        assertEquals(msg, "Name cannot be null or empty");
+        assertEquals("Name cannot be null or empty", msg);
+    }
+
+    @DisplayName("Should Not Make Reservation when Passenger passport number is invalid")
+    @ParameterizedTest
+    @MethodSource("passportNumberList")
+    public void shouldThrowRuntimeExceptionWhenPhoneNumberIsNull(String passportNumber){
+        String msg = null;
+        try {
+            item1.makeReservation(new Passenger("John", passportNumber, new Date()));
+        } catch (Exception e) {
+            msg = e.getMessage();
+        }
+        assertEquals("Passport number cannot be null or empty", msg);
+    }
+
+    private static List<String> passportNumberList() {
+        return Arrays.asList("A2", "000000", "AB231837%8");
     }
 }